Shoshone Falls

National Hydrography Dataset

Regional POC

Henry Nelson

Principal Steward

Linda Davis

Technical POC

Wilma Robertson Wilma.Robertson@idwr.idaho.gov

National Watershed Boundary Data

Principal Steward

Linda Davis

Technical POCGenna Ashley-Poulson

genna.ashley@idwr.idaho.gov

North Fork of the Payette

• “Completed” at 1:24,000 scale

• Information mostly derived from USGS topographic maps and USGS cartographic feature files

• Even though NHD available at 1:100,000 and 1:24,000 scale, our efforts are focused on improving 1:24,000K

We want to...

• Add more names to the NHD. Currently only 31% of flowlines have names.

• Improve connectivity and stream classification (perennial, intermittent, ephemeral).

• Add and improve other features such as springs, and dams as well as improve attribution of streams

NHD on top of NAIP 2004

We are..

• Improving geometry

• Improving flow directions and connectivity

• Gathering information from Irrigation Districts and other Land Managers

Customized NHD Edit Tool

Photo-revised and “hand-edited” paper maps

Lake Pend Oreille

We want to..

• Eventually include attributes into the 24K NHD data that allows for flow modeling and Streamstats

• Encourage the application of the NHD – for example

• Address water rights to the NHD

• SPARROW water quality monitoring

• Fish Passage Support System

We want to..

• Hear from you! Please submit updates, data and suggestions.

• Tell us how you are using the NHD!

• Stay in touch on our NHD website at: http://www.idwr.idaho.gov/hydrography/